Speedbox 2.1 for Giant

Marsoni

M251S

$139.50

Get it in 3 business days with 1 day shipping. Friday, May 29

Speedbox 2.1 for Giant" Specials " Speedbox 2. 1 for Giant Compatible with motors: Giant 2017 2021 PROPERTIES: Speed limiter: deactivated Display shows: actual values Compatible with motors: Giant 2017 2021 Activation: by pressing WALK WALK UP Compatible with SpeedBox App: NO Important Safety & Legal Warning: Performance Modification: The SpeedBox tuning chip is designed to update and modify your e bikes performance settingsaltering speed limits and acceleration curves

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Quick Dispatch:

Your Speedbox 2.1 for Giant orders ship within 1-2 business days.

Delivery Options:

Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

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We offer a 30-day return/exchange service after receiving.
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This seems to work very well. I will say that it seems to be pretty important to move the wheel around as soon as you can to distribute the product within the tire. I was held up for a few minutes and the Liqui tube seemed to start to set up in one spot and made the tire out of balance so I had to work quick to get it to distribute to the other parts of the tire. It seems to have worked though and so far the tires are holding air very well. I will be interested to see if it lasts for a long time but so far so good.

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Reviewed in the United States on May 18, 2026

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Captain Al

Lake Worth, US

★★★★★ 5

This stuff works!

Size: 32 oz

I was sceptical but wanted to avoid replacing 2 rear tires on my zero turn mower. The tires were leaking air and had bad sidewall cracking. I found the use of the product to be easy and quick. I aired up the tires and rode around the yard a few minutes to distribute the product in the tires. It has been 4 days and both tires remain aired up. Previously both tires would already be flat within this timeframe. Excellent results for me!

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Reviewed in the United States on May 18, 2026

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james Bays. Yup

San Leandro, US

★★★★★ 1

Doesn’t work for a car Tire seal slow leak

Size: 16 oz

Does not work for a car tire. Had a slow rim seal leak. Out 32oz in still leaks the same. Do not buy. I got the one with fibers in it. It worked just fine. This does not work. Period. $30 wasted actually I purchased two so I wasted $60 when I could’ve bought probably a new tire

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Reviewed in the United States on April 8, 2026

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Rebecca Parker

Alexandria, US

★★★★★ 5

#1 Tire Repair

Size: 16 oz

This stuff is Fantastic. I have a riding lawn mower and one of the front tires, which is small, had been running low for a couple of years, we took it off. to fill it with the liquiTube and you could see cracks all around the outside of the tire. The liquid tube oozed out of one of the cracks and sealed , immediately. My brother rolled the tire around real good before we put it back on the track lawn mower. It has been 3 days now and today I mowed for 1 1/2 hrs and the tire as full as it was the day we put in the LiquiTube. This stuff is fantastic, it really, really works!

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Reviewed in the United States on May 31, 2026

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Jana

San Leandro, US

★★★★★ 4

Awesome

Size: 32 oz

Works as advertised. Just don't scrimp... give it the full recommended amount in each tire

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Reviewed in the United States on May 27, 2026